Pinking machine



March 26, 1935. w. P. NluKKANr-:N-

PINKING MACHINE Filed March 9, 1934 Tilatented Mar. 26, 1935 UNITEDSTATES 4PATENT' OFFICE PINKING MACHINE William P. Niukkanen, Portland,Oreg.

Application March 9, 1934, Serial No. 714,860

1 Claim.

This invention relates to pinking machines, and has for its object theproduction of a simple and efficient means which maybe readily attachedto a sewing machine and which may be operated thereby for facilitatingthe cutting or forming of a pinked edge upon cloth or other material.

Another object of this invention is the production of a simple andeflicient means for adjusting the pressure wheel relative to the cutteror pinking wheel, so as to provide an efdcient cutting medium for thecloth or other material to be pinked.

A further object of this invention is the production of a simple andeilicient supporting means for the pinking wheel, the pressure wheel,and other associated parts, as well as the means for anchoring the partsin position for actuation by the needle operating bar or chuck, Withthese and other objects in view, this inf vention consists in certainnovel constructions, combinations and arrangements of parts as will behereinafter more fully described and claimed.

Figure 1 is a side elevation of a portion of a sewing machine equippedwith the pinking attachment;

Figure 2 is an end elevation of a portion of the sewing machine showingthe pinking attachment secured thereto;

Figure 3 is a section taken online 3-3 of Figure 2;

Figure ifis a section taken on line 4-4 of Figure l;

Figure 5 is a vertical section taken on line 5-5 of Figure 2, the clothplate being removed;

Figure 6 is a section taken on line 6-6 of Figure 5; and

Figure 'Z is a section taken on line 7-7 of Figure 5. l

By referring to the drawing, it will be seen that 1 designates thesewing machine which is provided with the usual needle operating bar orchuck 2. The cloth plate 3 of the usual type, is located below theneedle operating bar and chuck, as shown in Figure l, and may be of theusual and commercial type. 'I'he present pinking attachment comprises asupporting block 4 which rests upon the cloth plate 3, as shown inFigures 1 and 2 and this block 4 is anchored in position by means of abinding or set screw 5 which passes through the slotted end 6 of theanchoring bar 'I and secures this anchoring bar 7 in a set position uponthe cloth plate 3. The supporting block 4 is provided with an enlargedcut-out portion 8 upon one side thereof to provide a lower bearingsupport 9 and an upper bearing support 10. A suitable bushing or sleeve1l is carried by the lower bearing support 9, as shown in Figure 5 and apinking wheel supporting shaft 12 extends 5 through the bushing orsleeve 11 and through this lower bearing support 9. Upon the outer endof the pinking wheel supporting shaft 12 is mounted the cutter disc orpinking wheel 13, the surface of which is preferably zig-zag, as that 10clearly indicated in Figures 1 and 5 which causes a toothed effect inthe trimming edge of the fabric or other material to be pinked. Theopposite end of the shaft 12 supports a ratchet wheel 14 and a lever 15is loosely mounted upon this shaft 12 15 and is held thereon by means ofa suitable locking nut 16. A spring pressed pawl 17 is carried by thislever 15 and engages the ratchet wheel 14 so as to drive or rotate theshaft 12 in one direction as this lever l5 is oscillated. One end of thelever 15 is bifurcated, as indicated at 18, for facilitating -theconnection thereof with the needle operating bar or chuck 2 by means ofa suitable looking screw 19. It will therefore be seen that as-theneedle operating bar or chuck 2 reciprocates the lever 15 will beoscillated and through the actuation of the pawl and the ratchetdescribed, the shaft 12 will be rotated and the pinking wheel or disc 13which is keyed or locked upon the shaft 12, will also be rotated.

The upper bearing support 10 carries a shaft 20 which is locked againstlongitudinal movement by means of the locking screw 21 in theconventional rnanner, fitting in the groove 22. A bearing block 23 isiltted within a socket 24 formed in the underface of the upper bearingsupport 10 and this bearing block 23 is preferably square or rectangularin cross-section and constitutes a support through which the greaterlength of the shaft 20 passes. A pressure wheel 25 of substantially thewidth of the pinking disc or wheel 13 is carried by the outer end of theshaft 20 and the periphery thereof normally contacts with the zig-zagedge of the pinking wheel or disc 13 as shown clearly in the drawing. Inorder that the pressure wheel 25 may be adjusted so as to firmly Contactwith the cutting edge of the pinking wheel or disc 13, a binding screw26 is provided which is carried by the upper bearing support l0 andcontacts with the bearing block 23, as shown in Figures 5 and 7 wherebythe pressure wheel 25 may be forced into adjusted relation with the edgeof the pinking disc or wheel 13. From the foregoing description it willbe seen that a very simple and eilicient means has been provided forfacilitating the adjustment of the pressure wheel 25 relative to thepinking disc 13 and thereby facilitate the cutting or pinking of theedge of the material pasing between the disc 13 and the wheel 25. Asupporting table for the material to be pinked is indicated by thenumeral 27 and this table may be of any suitable size or character andis provided with a suitable aperture 28 through which the periphery ofthe pinking disc or wheel 13 extends, as shown in Figure 4. An abutmentbracket 29 is adjustably supported upon the block 4 and may be locked inposition by means o1.' a suitable locking screw 30, the abutment bracket29 having a right angularly extending lip 31. which lip is adapted toextend in back of the contact points of the disc i3 and wheel 25, asshown in Figure 4. This bracket 29 will permit of a proper adjustment soas to constitute an abutment against which the edge of the cloth orother material may rest while guiding the pinking material through thepinking apparatus.

It should be understood that certain detail changes in the mechanicalconstruction may be employed without departing from the spirit of theinvention, so long as these changes fall within the scope of theappended claim.

Having described the invention, what is claimed as new is:-

A pinking machine ot the class'described comprising a support, a tablecarried by said support, a pinking wheel, a shaft supporting saidpinking wheel, a lever carried by said shaft, ratchet means for rotatingsaid shaft as said lever is oscillated, means for anchoring said supportadiacent the needle operating bar of a sewing machine, an abutmentbracket adjustably mounted upon said support and resting upon saidtable, and a pressure wheel carried by said support in contact with saidpinking disc.

WILLIAM P. NIUKKANEN.

